BERKSHIRE HATHAWAY INC DEL

Ticker: BRK/B CUSIP: 084670702 Class: Common Stock

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013

Shares 3,853,924 Value ($000) $456,921 Avg Close $115.63 Range $110.84 - $118.66

Q3 2013

Shares 3,989,406 Value ($000) $452,837 Avg Close $115.36 Range $110.72 - $119.30

Q2 2013

Shares 4,076,206 Value ($000) $456,209 Avg Close $110.02 Range $102.69 - $115.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	3,853,924	$456,921	$115.63	$110.84 - $118.66
Q3 2013	3,989,406	$452,837	$115.36	$110.72 - $119.30
Q2 2013	4,076,206	$456,209	$110.02	$102.69 - $115.98